static int cpu_request_microcode(int cpu, const void *buf, size_t bufsize)
{
struct microcode_amd *mc_amd, *mc_old;
size_t offset = bufsize;
size_t last_offset, applied_offset = 0;
int error = 0;
struct ucode_cpu_info *uci = &per_cpu(ucode_cpu_info, cpu);
/* We should bind the task to the CPU */
BUG_ON(cpu != raw_smp_processor_id());
if ( *(const uint32_t *)buf != UCODE_MAGIC )
{
printk(KERN_ERR "microcode: Wrong microcode patch file magic\n");
error = -EINVAL;
goto out;
}
mc_amd = xmalloc(struct microcode_amd);
if ( !mc_amd )
{
printk(KERN_ERR "microcode: Cannot allocate memory for microcode patch\n");
error = -ENOMEM;
goto out;
}
error = install_equiv_cpu_table(mc_amd, buf, &offset);
if ( error )
{
xfree(mc_amd);
printk(KERN_ERR "microcode: installing equivalent cpu table failed\n");
error = -EINVAL;
goto out;
}
mc_old = uci->mc.mc_amd;
/* implicitely validates uci->mc.mc_valid */
uci->mc.mc_amd = mc_amd;
/*
* It's possible the data file has multiple matching ucode,
* lets keep searching till the latest version
*/
mc_amd->mpb = NULL;
mc_amd->mpb_size = 0;
last_offset = offset;
while ( (error = get_ucode_from_buffer_amd(mc_amd, buf, bufsize,
&offset)) == 0 )
{
if ( microcode_fits(mc_amd, cpu) )
{
error = apply_microcode(cpu);
if ( error )
break;
applied_offset = last_offset;
}
last_offset = offset;
if ( offset >= bufsize )
break;
}
/* On success keep the microcode patch for
* re-apply on resume.
*/
if ( applied_offset )
{
int ret = get_ucode_from_buffer_amd(mc_amd, buf, bufsize,
&applied_offset);
if ( ret == 0 )
xfree(mc_old);
else
error = ret;
}
if ( !applied_offset || error )
{
xfree(mc_amd);
uci->mc.mc_amd = mc_old;
}
out:
svm_host_osvw_init();
/*
* In some cases we may return an error even if processor's microcode has
* been updated. For example, the first patch in a container file is loaded
* successfully but subsequent container file processing encounters a
* failure.
*/
return error;
}
static int cpu_request_microcode(int cpu, const void *buf, size_t bufsize)
{
struct microcode_amd *mc_amd, *mc_old;
size_t offset = 0;
size_t last_offset, applied_offset = 0;
int error = 0, save_error = 1;
struct ucode_cpu_info *uci = &per_cpu(ucode_cpu_info, cpu);
unsigned int current_cpu_id;
unsigned int equiv_cpu_id;
/* We should bind the task to the CPU */
BUG_ON(cpu != raw_smp_processor_id());
current_cpu_id = cpuid_eax(0x00000001);
if ( *(const uint32_t *)buf != UCODE_MAGIC )
{
printk(KERN_ERR "microcode: Wrong microcode patch file magic\n");
error = -EINVAL;
goto out;
}
mc_amd = xmalloc(struct microcode_amd);
if ( !mc_amd )
{
printk(KERN_ERR "microcode: Cannot allocate memory for microcode patch\n");
error = -ENOMEM;
goto out;
}
/*
* Multiple container file support:
* 1. check if this container file has equiv_cpu_id match
* 2. If not, fast-fwd to next container file
*/
while ( offset < bufsize )
{
error = install_equiv_cpu_table(mc_amd, buf, &offset);
if ( error )
{
printk(KERN_ERR "microcode: installing equivalent cpu table failed\n");
break;
}
/*
* Could happen as we advance 'offset' early
* in install_equiv_cpu_table
*/
if ( offset > bufsize )
{
printk(KERN_ERR "microcode: Microcode buffer overrun\n");
error = -EINVAL;
break;
}
if ( find_equiv_cpu_id(mc_amd->equiv_cpu_table, current_cpu_id,
&equiv_cpu_id) )
break;
error = container_fast_forward(buf, bufsize - offset, &offset);
if ( error == -ENODATA )
{
ASSERT(offset == bufsize);
break;
}
if ( error )
{
printk(KERN_ERR "microcode: CPU%d incorrect or corrupt container file\n"
"microcode: Failed to update patch level. "
"Current lvl:%#x\n", cpu, uci->cpu_sig.rev);
break;
}
}
if ( error )
{
xfree(mc_amd);
goto out;
}
mc_old = uci->mc.mc_amd;
/* implicitely validates uci->mc.mc_valid */
uci->mc.mc_amd = mc_amd;
/*
* It's possible the data file has multiple matching ucode,
* lets keep searching till the latest version
*/
mc_amd->mpb = NULL;
mc_amd->mpb_size = 0;
last_offset = offset;
while ( (error = get_ucode_from_buffer_amd(mc_amd, buf, bufsize,
&offset)) == 0 )
{
if ( microcode_fits(mc_amd, cpu) )
{
error = apply_microcode(cpu);
if ( error )
break;
applied_offset = last_offset;
}
last_offset = offset;
if ( offset >= bufsize )
break;
/*
* 1. Given a situation where multiple containers exist and correct
* patch lives on a container that is not the last container.
* 2. We match equivalent ids using find_equiv_cpu_id() from the
* earlier while() (On this case, matches on earlier container
* file and we break)
* 3. Proceed to while ( (error = get_ucode_from_buffer_amd(mc_amd,
* buf, bufsize,&offset)) == 0 )
* 4. Find correct patch using microcode_fits() and apply the patch
* (Assume: apply_microcode() is successful)
* 5. The while() loop from (3) continues to parse the binary as
* there is a subsequent container file, but...
* 6. ...a correct patch can only be on one container and not on any
* subsequent ones. (Refer docs for more info) Therefore, we
* don't have to parse a subsequent container. So, we can abort
* the process here.
* 7. This ensures that we retain a success value (= 0) to 'error'
* before if ( mpbuf->type != UCODE_UCODE_TYPE ) evaluates to
* false and returns -EINVAL.
*/
if ( offset + SECTION_HDR_SIZE <= bufsize &&
*(const uint32_t *)(buf + offset) == UCODE_MAGIC )
break;
}
/* On success keep the microcode patch for
* re-apply on resume.
*/
if ( applied_offset )
{
save_error = get_ucode_from_buffer_amd(
mc_amd, buf, bufsize, &applied_offset);
if ( save_error )
error = save_error;
}
if ( save_error )
{
xfree(mc_amd);
uci->mc.mc_amd = mc_old;
}
else
xfree(mc_old);
out:
svm_host_osvw_init();
/*
* In some cases we may return an error even if processor's microcode has
* been updated. For example, the first patch in a container file is loaded
* successfully but subsequent container file processing encounters a
* failure.
*/
return error;
}
static int cpu_request_microcode(int cpu, const void *buf, size_t size)
{
const uint32_t *buf_pos;
unsigned long offset = 0;
int error;
struct ucode_cpu_info *uci = &per_cpu(ucode_cpu_info, cpu);
void *mc;
size_t mc_size;
/* We should bind the task to the CPU */
BUG_ON(cpu != raw_smp_processor_id());
buf_pos = (const uint32_t *)buf;
if ( buf_pos[0] != UCODE_MAGIC )
{
printk(KERN_ERR "microcode: error! Wrong "
"microcode patch file magic\n");
return -EINVAL;
}
error = install_equiv_cpu_table(buf, (uint32_t)(buf_pos[2]), &offset);
if ( error )
{
printk(KERN_ERR "microcode: installing equivalent cpu table failed\n");
return -EINVAL;
}
/* Size of 1st microcode patch in bytes */
mc_size = buf_pos[offset / sizeof(*buf_pos) + 1];
mc = xmalloc_bytes(mc_size);
if ( mc == NULL )
{
printk(KERN_ERR "microcode: error! "
"Can not allocate memory for microcode patch\n");
error = -ENOMEM;
goto out;
}
/* implicitely validates uci->mc.mc_valid */
uci->mc.mc_amd = mc;
/*
* It's possible the data file has multiple matching ucode,
* lets keep searching till the latest version
*/
while ( (error = get_next_ucode_from_buffer_amd(&mc, &mc_size, buf, size,
&offset)) == 0 )
{
uci->mc.mc_amd = mc;
error = microcode_fits(mc, cpu);
if (error <= 0)
continue;
error = apply_microcode(cpu);
if (error == 0)
{
error = 1;
break;
}
}
/* On success keep the microcode patch for
* re-apply on resume.
*/
if ( error <= 0 )
{
xfree(mc);
mc = NULL;
}
else
error = 0;
uci->mc.mc_amd = mc;
out:
xfree(equiv_cpu_table);
equiv_cpu_table = NULL;
return error;
}